Bug New Input System has more latency then old input (mouse position)

Context:
For our game, we use a UI Image as a cursor since we want controllers to be able to move the cursor as well. (Unity 2019.3.18f1 LTS)

Issue:
When making the cursor I noticed quite some delay using Player Input Invoke Unity Events (some delay is expected since we are not using the hardware cursor, but this is not usable). So I tried setting the cursor position in the Update function, this made it a little bit better. After this, I enabled the old input system again and tried setting the position with that. This improved the latency between the hardware cursor and UI cursor by a lot. Why does the new input system have more latency with the mouse (and maybe other inputs as well)?


Reproduction:

1. Create a new project and import the Input System
2. Project Settings -> Player -> ActiveInputHandeling -> Both
3. Debug the mouse position (while moving the mouse) using the new and old input system
   • Input.mousePosition
     
   • Mouse.current.position.ReadValue()
4. See the discrepancy in the mouse position (old input always ahead)

Also tested in unity 2020.3.10f1 LTS

 

It is also happening in 2020.3.25f1.
I'm using the mouse position to do a ScreenPointToRay and the latency is so high.

 

I switched to the new input system to fix this delay issue, very disappointed that it fixes nothing. What is the point of the new system if it fixes nothing? It is not convenient to use compared to the old one.